Bumper of a truck vehicle



FIG. 1 is a left, front perspective view of a bumper of a truck vehicleshowing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof,

FIG. 4 is a front view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a right side view thereof.

The ornamental design for a bumper of a truck vehicle, as shown anddescribed.